16545727721007 has 12 divisors (see below), whose sum is σ = 23903685329160. Its totient is φ = 11028500142768.

The previous prime is 16545727720979. The next prime is 16545727721011. The reversal of 16545727721007 is 70012772754561.

16545727721007 is a `hidden beast` number, since 1 + 6 + 54 + 572 + 7 + 7 + 2 + 10 + 0 + 7 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-16545727721007 is a prime.

It is a super-2 number, since 2×16545727721007² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16545727721087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 165364257 + ... + 165464282.

It is an arithmetic number, because the mean of its divisors is an integer number (1991973777430).

Almost surely, 2^{16545727721007} is an apocalyptic number.

16545727721007 is a deficient number, since it is larger than the sum of its proper divisors (7357957608153).

16545727721007 is a wasteful number, since it uses less digits than its factorization.

16545727721007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330834102 (or 330834099 counting only the distinct ones).

The product of its (nonzero) digits is 5762400, while the sum is 54.

The spelling of 16545727721007 in words is "sixteen trillion, five hundred forty-five billion, seven hundred twenty-seven million, seven hundred twenty-one thousand, seven".